Remove FileCheck from test case token_landingpad.ll.

[oota-llvm.git] / lib / Transforms / IPO / ElimAvailExtern.cpp

diff --git a/lib/Transforms/IPO/ElimAvailExtern.cpp b/lib/Transforms/IPO/ElimAvailExtern.cpp
index e70ab871b88d91be0ea72808b95830cd531278e7..af313a6b001d751405f0e727ff2db65816ad382f 100644 (file)
--- a/lib/Transforms/IPO/ElimAvailExtern.cpp
+++ b/lib/Transforms/IPO/ElimAvailExtern.cpp
@@ -1,4 +1,5 @@
-//===-- ElimAvailExtern.cpp - DCE unreachable internal functions ----------------===//
+//===-- ElimAvailExtern.cpp - DCE unreachable internal functions
+//----------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -15,32 +16,29 @@
 #include "llvm/Transforms/IPO.h"
 #include "llvm/ADT/Statistic.h"
 #include "llvm/IR/Constants.h"
-#include "llvm/IR/Instructions.h"
 #include "llvm/IR/Module.h"
-#include "llvm/Transforms/Utils/CtorUtils.h"
 #include "llvm/Transforms/Utils/GlobalStatus.h"
 #include "llvm/Pass.h"
 using namespace llvm;
 
 #define DEBUG_TYPE "elim-avail-extern"
 
-STATISTIC(NumAliases  , "Number of global aliases removed");
 STATISTIC(NumFunctions, "Number of functions removed");
 STATISTIC(NumVariables, "Number of global variables removed");
 
 namespace {
-  struct EliminateAvailableExternally : public ModulePass {
-    static char ID; // Pass identification, replacement for typeid
-    EliminateAvailableExternally() : ModulePass(ID) {
-      initializeEliminateAvailableExternallyPass(
-          *PassRegistry::getPassRegistry());
-    }
+struct EliminateAvailableExternally : public ModulePass {
+  static char ID; // Pass identification, replacement for typeid
+  EliminateAvailableExternally() : ModulePass(ID) {
+    initializeEliminateAvailableExternallyPass(
+        *PassRegistry::getPassRegistry());
+  }
 
-    // run - Do the EliminateAvailableExternally pass on the specified module,
-    // optionally updating the specified callgraph to reflect the changes.
-    //
-    bool runOnModule(Module &M) override;
-  };
+  // run - Do the EliminateAvailableExternally pass on the specified module,
+  // optionally updating the specified callgraph to reflect the changes.
+  //
+  bool runOnModule(Module &M) override;
+};
 }
 
 char EliminateAvailableExternally::ID = 0;
@@ -55,41 +53,31 @@ bool EliminateAvailableExternally::runOnModule(Module &M) {
   bool Changed = false;
 
   // Drop initializers of available externally global variables.
-  for (Module::global_iterator I = M.global_begin(), E = M.global_end();
-       I != E; ++I) {
-    if (!I->hasAvailableExternallyLinkage())
+  for (GlobalVariable &GV : M.globals()) {
+    if (!GV.hasAvailableExternallyLinkage())
       continue;
-    if (I->hasInitializer()) {
-      Constant *Init = I->getInitializer();
-      I->setInitializer(nullptr);
+    if (GV.hasInitializer()) {
+      Constant *Init = GV.getInitializer();
+      GV.setInitializer(nullptr);
       if (isSafeToDestroyConstant(Init))
         Init->destroyConstant();
     }
-    I->removeDeadConstantUsers();
-    I->setLinkage(GlobalValue::ExternalLinkage);
+    GV.removeDeadConstantUsers();
+    GV.setLinkage(GlobalValue::ExternalLinkage);
     NumVariables++;
+    Changed = true;
   }
 
   // Drop the bodies of available externally functions.
-  for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
-    if (!I->hasAvailableExternallyLinkage())
+  for (Function &F : M) {
+    if (!F.hasAvailableExternallyLinkage())
       continue;
-    if (!I->isDeclaration())
+    if (!F.isDeclaration())
       // This will set the linkage to external
-      I->deleteBody();
-    I->removeDeadConstantUsers();
+      F.deleteBody();
+    F.removeDeadConstantUsers();
     NumFunctions++;
-  }
-
-  // Drop targets of available externally aliases.
-  for (Module::alias_iterator I = M.alias_begin(), E = M.alias_end(); I != E;
-       ++I) {
-    if (!I->hasAvailableExternallyLinkage())
-      continue;
-    I->setAliasee(nullptr);
-    I->removeDeadConstantUsers();
-    I->setLinkage(GlobalValue::ExternalLinkage);
-    NumAliases++;
+    Changed = true;
   }
 
   return Changed;